In The Name of Allaah, The Most Merciful, The Bestower of Mercy.
Firstly: We repeat once again the fact that rebutting false beliefs, ideas and views does not necessitate bad behaviour, rather Muslims are commanded to behave well towards others.
Allaah [The Most High] said: [ قُلۡ يَـٰٓأَهۡلَ ٱلۡكِتَـٰبِ تَعَالَوۡاْ إِلَىٰ ڪَلِمَةٍ۬ سَوَآءِۭ بَيۡنَنَا وَبَيۡنَكُمۡ أَلَّا نَعۡبُدَ إِلَّا ٱللَّهَ وَلَا نُشۡرِكَ بِهِۦ شَيۡـًٔ۬ا وَلَا يَتَّخِذَ بَعۡضُنَا بَعۡضًا أَرۡبَابً۬ا مِّن دُونِ ٱللَّهِۚ فَإِن تَوَلَّوۡاْ فَقُولُواْ ٱشۡهَدُواْ بِأَنَّا مُسۡلِمُونَ –Say (O Muhammad): “O people of the Scripture (Jews and Christians): Come to a word that is just between us and you, that we worship none but Allah, and that we associate no partners with Him, and that none of us shall take others as lords besides Allah. Then, if they turn away, say: “Bear witness that we are Muslims]. [Surah Aal Imraan. Aayah 64]
Meaning: say to the people of the scripture – the Jews and Christians, [تَعَالَوۡاْ إِلَىٰ ڪَلِمَةٍ۬ سَوَآءِۭ بَيۡنَنَا وَبَيۡنَكُمۡ – Come to a word that is just between us and you]- Meaning: Come let us unite upon the statement which all the Prophets and Messengers agreed upon and none opposes it except the obstinate and misguided. This statement is not specific to anyone of us; rather it is something that you and us should establish between us, so this is justice and fairness in debate. Then Allaah explains this and said: [أَلَّا نَعۡبُدَ إِلَّا ٱللَّهَ وَلَا نُشۡرِكَ بِهِۦ شَيۡـًٔ۬ا – that we worship none but Allah, and that we associate no partners with Him]- Meaning: We should single out Allaah in worship, devoting all love, fear and hope to Him alone, and we should not associate anyone as partner with Allaah in worship- neither a Prophet, an Angel, a Righteous Person, an Idol, a Deified image, a living or non-living thing, [وَلَا يَتَّخِذَ بَعۡضُنَا بَعۡضًا أَرۡبَابً۬ا مِّن دُونِ ٱللَّهِۚ – and that none of us shall take others as lords besides Allaah]; rather all obedience is to be devoted to Allah and His Messengers. [فَإِن تَوَلَّوۡاْ فَقُولُواْ ٱشۡهَدُواْ بِأَنَّا مُسۡلِمُونَ – Then, if they turn away, say: “Bear witness that we are Muslims]”. [Tafsir As-Sadi]
Allaah [The Exalted] said:
وَمَن يَبۡتَغِ غَيۡرَ ٱلۡإِسۡلَـٰمِ دِينً۬ا فَلَن يُقۡبَلَ مِنۡهُ وَهُوَ فِى ٱلۡأَخِرَةِ مِنَ ٱلۡخَـٰسِرِينَ
And whoever seeks a religion other than Islam, it will never be accepted of him, and in the Hereafter he will be one of the losers. [Surah Aal Imraan. Aayah 85]
This Aayah is directed at the people of the Scripture and other than them, for indeed it is found in last Aayaat of Surah Aal Imran in which the people of the book were addressed and engaged in debate. It was revealed to the Prophet [peace and blessings of Allaah be upon him] when the Christian delegation of Najraan came to him and they were sixty in number, amongst them was a leader, important and common people. Their story is well known. This Aayah was revealed before the religion of the Christians was rebuked- those who innovated into their religion and changed the religion of the Messiah [peace and blessings of Allaah be upon him]. The truth brought by the Messiah [peace and blessings of Allaah be upon him] is not the falsehood they have innovated to the extent that their religion comprises of truth and falsehood- falsehood mixed with truth. It is almost impossible to find someone in their religion who has knowledge of that which the Messiah [peace and blessings of Allaah be upon him] abrogated in the Tawraat or confirmed. The Messiah [peace and blessings of Allaah be upon him] affirmed the majority of that which was in the Tawraat, but the Christians in general do not distinguish between what the Messiah [peace and blessings of Allaah be upon him] affirmed and other than it, because they do not know the religion of the Messiah [peace and blessings of Allaah be upon him]. Allaah [The Exalted] said:
مَا كَانَ لِبَشَرٍ أَن يُؤۡتِيَهُ ٱللَّهُ ٱلۡكِتَـٰبَ وَٱلۡحُكۡمَ وَٱلنُّبُوَّةَ ثُمَّ يَقُولَ لِلنَّاسِ كُونُواْ عِبَادً۬ا لِّى مِن دُونِ ٱللَّهِ وَلَـٰكِن كُونُواْ رَبَّـٰنِيِّـۧنَ بِمَا كُنتُمۡ تُعَلِّمُونَ ٱلۡكِتَـٰبَ وَبِمَا كُنتُمۡ تَدۡرُسُونَ
وَلَا يَأۡمُرَكُمۡ أَن تَتَّخِذُواْ ٱلۡمَلَـٰٓٮِٕكَةَ وَٱلنَّبِيِّـۧنَ أَرۡبَابًاۗ أَيَأۡمُرُكُم بِٱلۡكُفۡرِ بَعۡدَ إِذۡ أَنتُم مُّسۡلِمُونَ
It is not (possible) for any human being to whom Allah has given the Book and Al-Hukma (the knowledge and understanding of the laws of religion, etc.) and Prophethood to say to the people: “Be my worshippers rather than Allah’s.” On the contrary (he would say): “Be you Rabbaniyun (learned men of religion who practise what they know and also preach others), because you are teaching the Book, and you are studying it.” Nor would he order you to take angels and Prophets for lords (gods). Would he order you to disbelieve after you have submitted to Allah’s Will? [Surah Aal Imraan. Aayaat 79-80]
Indeed, Allaah [The Exalted] made it known that the one who takes the Angels and Prophets as lords is a disbeliever. The one who take lords besides Allaah is more deserving of being judged to be upon disbelief, and indeed Allaah mentioned that the Christians took those lesser in status than the Prophets and Angels as lords. Allaah [The Exalted] said:
ٱتَّخَذُوٓاْ أَحۡبَارَهُمۡ وَرُهۡبَـٰنَهُمۡ أَرۡبَابً۬ا مِّن دُونِ ٱللَّهِ وَٱلۡمَسِيحَ ٱبۡنَ مَرۡيَمَ وَمَآ أُمِرُوٓاْ إِلَّا لِيَعۡبُدُوٓاْ إِلَـٰهً۬ا وَٲحِدً۬اۖ لَّآ إِلَـٰهَ إِلَّا هُوَۚ سُبۡحَـٰنَهُ ۥ عَمَّا يُشۡرِڪُونَ
They (Jews and Christians) took their rabbis and their monks to be their lords besides Allah (by obeying them in things which they made lawful or unlawful according to their own desires without being ordered by Allah), and (they also took as their Lord) Messiah, son of Maryam (Mary), while they (Jews and Christians) were commanded [in the Taurat (Torah) and the Injeel (Gospel)) to worship none but One Ilah (God – Allah) La ilaha illa Huwa (none has the right to be worshipped but He) . Praise and glory be to Him, (far above is He) from having the partners they associate (with Him).” [Surah At-Tawbah. Aayah 31] [End of quote] [An Excerpt from Al-Jawaabus Saheeh Liman Baddal Deen Al-Maseeh. Vol 1. Pages 198-199. Slightly paraphrased]
Finally, we repeat once again the fact that rebutting false beliefs, ideas and views does not necessitate bad behaviour, rather Muslims are commanded to behave well towards others.
To be continued InShaaAllaah